In April of this year, Peters, who has been writing mysteries for 30 years, was honored as a Grand Master by the Mystery Writers of America. This captivating novel, her 10th Amelia Peabody tale (following Seeing a Large Cat, 1997), validates her peers' high regard. Prospects for the 1907 excavation season in Egypt seem lackluster for the Emersons, since Professor Emerson, Amelia's beloved husband, can't abide the fools who administrate such activities--and makes no secret of that fact. But the family, including their adult son, Ramses, and his foster siblings, Nefret and David, departs for Egypt nevertheless after incidents in London point to the resurfacing of their old nemesis, known as the Master Criminal. The younger generation buys an ancient papyrus from an antiquities dealer and sets in motion a sinister chain of events. Two horrendous murders draw all of the Emersons further into the fray, and at times it seems as if the Master Criminal and his minions will at last best Amelia. But by drawing on the skills of all, the Emerson contingent once again brings villains to justice. The plot is complicated and involving, but the maturing of Ramses, Nefret and David offers particular pleasure and gives the book depth and poignance. Rich in characterization, incident and humor, this latest adventure of Amelia Peabody is a grand, galloping adventure with a heart as big as the Great Pyramid itself. Author tour. (Aug.)